/***************************************************************************
 * Copyright 2012-2013 TXT e-solutions SpA
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 * This work was performed within the IoT_at_Work Project
 * and partially funded by the European Commission's
 * 7th Framework Programme under the contract ICT-257367.
 *
 * Authors:
 *      Salvatore Piccione (TXT e-solutions SpA)
 *
 * Contributors:
 *        Domenico Rotondi (TXT e-solutions SpA)
 **************************************************************************/
package it.txt.ens.client.subscriber.impl.osgi;

import it.txt.ens.client.subscriber.osgi.FilterAttributes;
import it.txt.ens.client.subscriber.osgi.RegisteredServices;

import java.util.Dictionary;
import java.util.Hashtable;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.Constants;
import org.osgi.framework.ServiceRegistration;
import org.osgi.service.cm.ManagedServiceFactory;

/**
 * @author Salvatore Piccione (TXT e-solutions SpA - salvatore.piccione AT txtgroup.com)
 * @author Domenico Rotondi (TXT e-solutions SpA - domenico.rotondi AT txtgroup.com)
 *
 */
public class Activator implements BundleActivator {

    private static final Logger LOGGER = Logger.getLogger(Activator.class.getName());
    private ServiceRegistration<?> registration;
    private ServiceRegistration<?> eventFactoryRegistration;
    
    /* (non-Javadoc)
     * @see org.osgi.framework.BundleActivator#start(org.osgi.framework.BundleContext)
     */
    @Override
    public void start(BundleContext context) throws Exception {
        if (LOGGER.isLoggable(Level.INFO)) {
            LOGGER.log(Level.INFO, "[ENS Subscriber - default implementation] Bundle ID: " +
                context.getBundle().getBundleId());
        }
        
        Dictionary<String, Object> properties = new Hashtable<String, Object>();
        properties.put(Constants.SERVICE_PID, RegisteredServices.SUBSCRIBER_MANAGED_SERVICE_FACTORY_PID);
        properties.put(FilterAttributes.SUBSCRIBER_IMPLEMENTATION_KEY, BasicENSSubscriberMSF.IMPLEMENTATION_ID);
        registration = context.registerService(ManagedServiceFactory.class, new BasicENSSubscriberMSF(context), properties);
        if (LOGGER.isLoggable(Level.FINE)) {
            LOGGER.log(Level.FINE, "Registered an instance of " + ManagedServiceFactory.class.getName() +
                " with PID " + RegisteredServices.SUBSCRIBER_MANAGED_SERVICE_FACTORY_PID);
        }
        
        properties = new Hashtable<String, Object>();
        properties.put(FilterAttributes.EVENT_FACTORY_IMPLEMENTATION,
                BasicENSEventFactorySF.IMPLEMENTATION_ID);
        eventFactoryRegistration = context.registerService(
            RegisteredServices.EVENT_FACTORY.getName(),
            new BasicENSEventFactorySF(), null);
    }

    /* (non-Javadoc)
     * @see org.osgi.framework.BundleActivator#stop(org.osgi.framework.BundleContext)
     */
    @Override
    public void stop(BundleContext context) throws Exception {
//        subscriberMSF.shutdown();
        registration.unregister();
        eventFactoryRegistration.unregister();
    }
}
